A teenage boy visiting Yellowstone National Park was seriously burned when his foot broke through the ground near a geyser by the infamous Old Faithful, officials said.

MAMMOTH HOT SPRINGS, WY (Gray News) – A teenager suffered “significant thermal burns” at Yellowstone National Park on Monday. According to the National Park Service, the 17-year-old boy “suffered significant thermal burns on his foot and ankle” near Old Faithful while on a hike.

The incident occurred on Monday morning when the boy was on a hike in the thermal area of the park in the vicinity of the Lone Star Geyser near Old Faithful when his foot broke through the thin crust and he suffered significant thermal burns to his foot and ankle, according to a statement from the National Park Service.